The USMS (Underbarrel Shotgun Module System or 'Use-Mess') is a pump-action shotgun mounted on the underside of assault rifles and exclusively onto the TSW-60. ATA Arms 04546-G1230-BLK: The ATA Game Over & Under shotgun embodies the synthesis of 50 years of master craftsmanship and contemporary technology and is built on a similar platform as the legendary design as the Beretta 686. UNDERBARREL SHOTGUN FOR SALE - Mossberg Hunting Shotgun Reviews : If you're looking for UNDERBARREL SHOTGUN FOR SALE - Mossberg Hunting Shotgun. The 'Riot Shotgun', likewise, is the Norinco Hawk Semi-Auto Tactical clone, minus the stock and with a small drum magazine that holds 12 shells at once. Kalashnikov USA KS-12 & KS-12T Shotgun Magazine - Black | 5rd.

This magazine is constructed with no electronic parts and is loaded by pouring BBs into the storage chamber and manually winding the wheel to feed BBs into the high tension spring.